CN113758182A

CN113758182A - Ternary precursor rotary kiln drying device

Info

Publication number: CN113758182A
Application number: CN202110946282.4A
Authority: CN
Inventors: 赵志安; 闫修林; 朱伯伦; 徐克俭; 丁立平; 陈云; 钱华
Original assignee: Anhui Xien Recycling Technology Co ltd; Shanghai Cn Science And Technology Co ltd; Chizhou Cn New Material Technology Co ltd
Current assignee: Anhui Xien Recycling Technology Co ltd; Shanghai Cn Science And Technology Co ltd; Chizhou Cn New Material Technology Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-12-07
Anticipated expiration: 2041-08-18
Also published as: CN113758182B

Abstract

The invention discloses a ternary precursor rotary kiln drying device which comprises a kiln body, a hot air heating mechanism and a steam heating mechanism. The kiln body comprises an outer cylinder and an inner cylinder, wherein an accommodating space is formed inside the inner cylinder, and an interlayer is formed between the outer cylinder and the inner cylinder. The hot air heating mechanism comprises a hot air input pipe, a hot air connecting pipe and a hot air output pipe, the hot air input pipe extends into one end of the kiln body, the hot air output pipe extends into one end of the kiln body, which is far away from the hot air input pipe, and the ends, which are far away from the kiln body, of the hot air input pipe and the hot air output pipe are communicated through the hot air connecting pipe. And the steam heating mechanism comprises a first steam pipe, and one end of the first steam pipe extends into one end of the kiln body, which is close to the hot air input pipe, and is communicated with the interlayer. The ternary precursor is heated by two modes of steam and hot air, and the hot air is recycled, so that the yield is increased from the maximum 500 kilograms per hour of steam heating to 2-3 tons per hour, and the method is environment-friendly and low in pollution.

Description

Ternary precursor rotary kiln drying device

Technical Field

The invention relates to the technical field of drying devices, in particular to a drying device of a ternary precursor rotary kiln.

Background

The ternary precursor material is a raw material of a sintered ternary material and is a nickel-cobalt-manganese compound. The drying of the ternary precursor is an important ring in the production process of the precursor, and the water content of the precursor after filter pressing and centrifugation needs to be reduced from about 7 percent to below 0.4 percent so as to meet the requirement of a precursor product. The currently commonly used equipment for drying the precursor is a disc type steam dryer, a hot air dryer and the like. The hot air dryer has a low efficiency. The disc drier is a drying device which is developed by integrating a series of advanced technologies and continuously improving on the basis of an intermittent stirring and conducting drier, is a multi-layer fixed hollow heating circular material carrying disc, is stirred by a rotary rake, and is vertical and continuous and mainly used for heat conduction. The drying process is that heat carrier is introduced into hollow discs in different layers to heat wet material on the disc surface indirectly in heat conducting mode, and under the action of the rotating rake blades, the wet material in the material is evaporated at operation temperature and the vapor is exhausted with tail gas from the apparatus to obtain qualified dried product continuously in the bottom of the apparatus. The drying and heating temperature of the precursor is controlled below 150 ℃ according to the process requirement, and is recommended to be 120-125 ℃; otherwise, too high temperature will affect the quality of the precursor product.

There are three key factors for the drying efficiency of the precursor. Firstly, sufficient heat is increased for the vaporization of moisture; secondly, continuously providing dry hot air with the humidity lower than 40% to absorb water vapor to dry the precursor; and thirdly, the precursor is mixed with dry hot air, so that sufficient contact area is provided, and the moisture can escape from the precursor after being heated.

The current ternary precursor dryers have respective room for improvement. For example, a tray dryer thins the precursor into a plurality of layers, each of which evaporates moisture from below by steam heating or by hot air surface heating. The precursor particles are packed together and only the uppermost particles are in contact with air. The surface area of these particles in the precursor is very large, adding up to much more than the area of each of these layers. If the precursor can be continuously thrown away in the hot drying air and fully mixed with the hot drying air, the contact chance and area of the precursor particles and the hot air are increased, the dehydration speed of the precursor can be remarkably improved, and the productivity is improved.

The drying method is mainly selected from hot air drying and steam drying. Hot air drying uses hot air as a heating source, the evaporation of the moisture of the precursor requires a large amount of heat absorption, for example, 1 ton of precursor is dried per hour, the moisture is dried from 6% to 0.3%, the amount of heat absorbed by steam per kg of water is 2250 kilojoules per kilogram, and the evaporation of 60kg of water requires about 135000 kilojoules per kilogram. The specific heat capacity of the air is about 1.0 kJ/(kg. multidot.K), each cubic hot air is cooled from 120 ℃ to 100 ℃ to release 20kJ of heat, and if the 120 ℃ hot air is completely adopted for heating, 135000 kilojoules of heat needs 6750 cubic hot air. The precursor is a fine particulate matter with a particle size of about 10um, and is easily lifted by strong wind in a dry state. When the hot air rotary kiln is used, the wind power and the wind volume of hot air in the rotary kiln are limited. The ternary precursor is a low-valence compound of variable-valence metal, and can be oxidized in the air, and the higher the drying temperature is, the faster the oxidation is, and the hot air temperature is not suitable to be too high. The content of the high-quality magnetic foreign matters in the precursor is required to be within dozens of ppb, the requirement is extremely high, and the excessive hot air gas contacts the precursor, so that the precursor is easily polluted, and the product quality is influenced. For these reasons, the hot air drying method is not suitable for use in a high-capacity situation.

Steam drying uses steam as a heating source, and steam is an excellent heating and conveying medium. The high-pressure steam at 120 ℃ carries a large amount of heat, and 2250 kilojoule of heat can be released from the steam to water per kilogram. The temperature and humidity of the precursor affect the drying speed. Under the same temperature and humidity of the precursor, the contact area of the precursor and the air determines the evaporation capacity and the drying speed of the moisture. If the precursor particles are packed together, only the uppermost particles are in contact with air. And the precursor particles are smaller, the thicker the accumulation is, the more serious the overlapping is, the smaller the area of the precursor contacting the air is, and the rapid evaporation and drying of the moisture are seriously restricted. Therefore, it is not sufficient to pay attention to the supply of the heat of the high-pressure steam.

The existing disc type steam drier adopts 120 ℃ steam for heating, and about 500 kilograms of precursors can be dried per hour. The hot air dryer adopts hot air heating at 120 ℃, and about 200 kg of precursor can be dried per hour. The yields of the two single drying modes are low.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the problems occurring in the prior art.

Therefore, the technical problem to be solved by the invention is to solve the problem of low yield caused by the adoption of a single steam or hot air mode to dry the ternary precursor in the prior art.

In order to solve the technical problems, the invention provides the following technical scheme: a drying device of a ternary precursor rotary kiln comprises a kiln body, a hot air heating mechanism and a steam heating mechanism. The kiln body comprises an outer cylinder and an inner cylinder, an accommodating space is formed in the inner cylinder, and an interlayer is formed between the outer cylinder and the inner cylinder; the hot air heating mechanism comprises a hot air input pipe, a hot air connecting pipe and a hot air output pipe, the hot air input pipe extends into one end of the kiln body, the hot air output pipe extends into one end of the kiln body, which is far away from the hot air input pipe, and the ends of the hot air input pipe and the hot air output pipe, which are far away from the kiln body, are communicated through the hot air connecting pipe; and the steam heating mechanism comprises a first steam pipe, and one end of the first steam pipe extends into one end of the kiln body, which is close to the hot air input pipe, and is communicated with the interlayer.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the kiln body comprises a kiln head and a kiln tail, and a plurality of shovelling plates are arranged on the inner wall of the inner cylinder. The hot air input pipe and the first steam pipe penetrate through the kiln head and extend into the kiln body, the hot air output pipe penetrates through the kiln tail and extend into the kiln body, and rubber pressing strips are arranged at the joints of the kiln head, the kiln tail and the outer barrel.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the steam heating mechanism further comprises a second steam pipe and a heat exchanger, the heat exchanger is arranged on the hot air input pipe, one end of the second steam pipe is connected with the first steam pipe, and the other end of the second steam pipe is connected with the hot air input pipe through the heat exchanger.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the hot air heating mechanism further comprises an induced draft fan, an air blower and an air compensating valve, wherein the induced draft fan is arranged at the joint of the hot air output pipe and the hot air connecting pipe, the air blower is arranged at the joint of the hot air connecting pipe and the hot air input pipe, and the air compensating valve is arranged on the hot air connecting pipe.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the steam heating mechanism further comprises a rotary joint, the rotary joint is arranged at one end of the side where the kiln head is located, the rotary joint comprises an air inlet and a plurality of air outlets, the air outlets penetrate through the wall of the inner barrel and are communicated with the interlayer, and one end of the first steam pipeline is connected with the air inlet.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the kiln tail is communicated with the accommodating space through the kiln tail.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the feeding mechanism further comprises a material baffle arranged at one end, close to the kiln tail, of the inner barrel, the feeding screw penetrates through the kiln tail and the material baffle to be communicated with the accommodating space, and the kiln tail is provided with a material cleaning port.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: still include unloading mechanism, unloading mechanism includes screw conveyer, and screw conveyer connects the kiln head, is provided with water-cooling jacket on the screw conveyer.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the blanking mechanism further comprises a first blanking pipe, a second blanking pipe and a fan, one end of the first blanking pipe is connected with the kiln head, the other end of the first blanking pipe is connected with the fan, one end of the second blanking pipe is connected with the fan, and the other end of the second blanking pipe is connected with the screw conveyer.

As a preferred scheme of the drying device of the ternary precursor rotary kiln of the invention, the drying device comprises: the one end that the urceolus outer wall is close to the kiln head is provided with the trap, trap and intermediate layer intercommunication, be provided with the pulse dust remover on the hot-blast output tube, be provided with water-cooled condenser on the hot-blast connecting pipe, the gulp valve is connected with air cleaner.

The invention has the beneficial effects that: the ternary precursor is heated by two modes of steam and hot air, and the hot air is recycled, so that the yield is increased from the maximum 500 kilograms per hour of steam heating to 2-3 tons per hour, and the method is environment-friendly and low in pollution.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a sectional view of a kiln body in a first embodiment.

Fig. 2 is an overall structure diagram of the first, second, and third embodiments.

Fig. 3 is a structural view of a second embodiment.

Fig. 4 is a structural view of a third embodiment.

Fig. 5 is a partial structural view of a in fig. 2.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1, 2 and 5, a first embodiment of the present invention provides a drying device for a ternary precursor rotary kiln, which includes a kiln body 100, a hot air heating mechanism 200 and a steam heating mechanism 300. The kiln body 100 comprises an outer cylinder 101 and an inner cylinder 102, wherein an accommodating space M is formed inside the inner cylinder 102, and an interlayer N is formed between the outer cylinder 101 and the inner cylinder 102. Because substances such as iron, nickel and the like have great influence on the quality of the precursor, the precursor product has high requirement on the content of the impurities. The inner cylinder 102 and the hollow shoveling plates 105 are made of titanium material, and the outer cylinder 101 is made of stainless steel and other materials. The hot air heating mechanism 200 comprises a hot air input pipe 201, a hot air connecting pipe 202 and a hot air output pipe 203, wherein the hot air input pipe 201 extends into one end of the kiln body 100, the hot air output pipe 203 extends into one end of the kiln body 100 far away from the hot air input pipe 201, and one ends of the hot air input pipe 201 and the hot air output pipe 203 far away from the kiln body 100 are communicated through the hot air connecting pipe 202. The steam heating mechanism 300 comprises a first steam pipe 301, and one end of the first steam pipe 301 extends into one end of the kiln body 100 close to the hot air input pipe 201 and is communicated with the interlayer N. The two ends of the interlayer N are closed, wherein steam is introduced through the first steam pipe 301 for heating the material in the accommodating space M. Hot air is introduced into the hot air input pipe 201, enters the accommodating space M and is used for drying materials, and the hot air can be recycled. The direction of the arrows in fig. 2 indicates the flow direction of the hot air and steam.

Further, the kiln body 100 comprises a kiln head 103 and a kiln tail 104, wherein the kiln head 103 and the kiln tail 104 are hollow inside, and one end far away from the kiln body 100 is closed. The kiln body 100 is arranged obliquely, the angle is about 3 degrees, one end of the kiln head 103 is low, and one end of the kiln tail 104 is high. The inner wall of the inner cylinder 102 is provided with a plurality of shovelling plates 105. The shoveling plates 105 can enable the kiln body 100 to continuously lift materials in the rotating process, so that the materials are uniformly distributed in the accommodating space M, the contact area between the kiln body and hot air is increased, and the drying efficiency is improved. The hot air input pipe 201 and the first steam pipe 301 penetrate through the kiln head 103 and extend into the kiln body 100, the hot air output pipe 203 penetrates through the kiln tail 104 and extend into the kiln body 100, and rubber pressing strips 108 are arranged at the joints of the kiln head 103 and the kiln tail 104 and the outer cylinder 101, as shown in fig. 5. During the rotation of the kiln body 100, the kiln head 103 and the kiln tail 104 are fixed, and the rubber pressure strips 108 are used for sealing to prevent hot air from leaking.

Further, the steam heating mechanism 300 further includes a second steam pipe 302 and a heat exchanger 303, the heat exchanger 303 is disposed on the hot air input pipe 201, one end of the second steam pipe 302 is connected to the first steam pipe 301, and the other end is connected to the hot air input pipe 201 through the heat exchanger 303. The steam in the second steam pipe 302 enters the heat exchanger 303 to heat the air to form hot air.

Further, hot-blast heating mechanism 200 still includes draught fan 204, air-blower 205 and gulp valve 206, draught fan 204 set up in hot-blast output tube 203 and hot-blast connecting pipe 202 junction, air-blower 205 set up in hot-blast connecting pipe 202 and hot-blast input tube 201 junction, gulp valve 206 set up in on the hot-blast connecting pipe 202. The induced draft fan 204 and the blower 205 drive hot air to circularly move in the rotary kiln, and the air compensating valve 206 is used for introducing outside air into the hot air input pipe 201 to serve as a source of the hot air.

Further, the steam heating mechanism 300 further comprises a rotary joint 304, the rotary joint 304 is arranged at one end of the rotary kiln on the side of the kiln head 103, the rotary joint 304 comprises an air inlet 304a and a plurality of air outlets 304b, the air outlets 304b penetrate through the wall of the inner barrel 102 and are communicated with the interlayer N, and one end of the first steam pipeline 301 is connected with the air inlet 304 a.

Example 2

Referring to fig. 2 and 3, a second embodiment of the invention is shown in fig. 3 with the kiln tail 104 and kiln body 100 exploded. This embodiment is based on the first embodiment, and is characterized by further comprising a feeding mechanism 400, wherein the feeding mechanism 400 comprises a feeding screw 401, and one end of the feeding screw 401 passes through the kiln tail 104 and is communicated with the accommodating space M. The feed screw 401 is used to convey material into the kiln body 101.

Further, the feeding mechanism 400 further comprises a material baffle 402 arranged at one end of the inner cylinder 102 close to the kiln tail 104, the feeding screw 401 penetrates through the kiln tail 104 and the material baffle 402 to be communicated with the accommodating space M, and the kiln tail 104 is provided with a material cleaning port 104 a. A material baffle 402 is fixed at the end of the inner barrel, and the diameter of the material baffle 402 is smaller than that of the inner barrel, and the material baffle 402 is used for preventing the material in the accommodating space M from flowing to the kiln tail 104.

Example 3

Referring to fig. 2 and 4, a second embodiment of the present invention is based on the first embodiment, and the second embodiment is characterized by further comprising a blanking mechanism 500, wherein the blanking mechanism 500 comprises a screw conveyor 501, the screw conveyor 501 is connected with the kiln head 103, and a water-cooling jacket 501a is arranged on the screw conveyor 501. The screw conveyor 501 is used to convey the dried material to the outside. Flowing water is introduced into the water-cooling jacket 501a to cool the material.

Further, the blanking mechanism 500 further comprises a first blanking pipe 502, a second blanking pipe 503 and a wind-up machine 504, wherein one end of the first blanking pipe 502 is connected with the kiln head 103, the other end of the first blanking pipe is connected with the wind-up machine 504, one end of the second blanking pipe 503 is connected with the wind-up machine 504, and the other end of the second blanking pipe is connected with the screw conveyor 501. The air shutter 504 can ensure that the air is discharged while preventing the hot air inside the kiln body 100 from leaking and preventing the external air from entering the kiln body 100.

Furthermore, a drain valve 109 is arranged at one end of the outer wall of the outer cylinder 101 close to the kiln head 103, the drain valve 109 is communicated with the interlayer N, a pulse dust collector 207 is arranged on the hot air output pipe 203, a water-cooled condenser 208 is arranged on the hot air connecting pipe 202, and the air compensating valve 206 is connected with an air filter 209. Since steam is vaporized during heating to generate a large amount of water, trap 109 is used to drain water from interlayer N. The pulse dust collector 207 is used for collecting a small amount of materials carried in hot air, and the water-cooled condenser 208 is used for cooling the hot air so as to condense and discharge moisture in the hot air.

The working principle is that the external air enters the hot air connecting pipe 202 through the air compensating valve 206, and the air flows towards the kiln head 103 under the action of the blower 205. The external steam enters a first steam pipe 301, a part of the steam enters the interlayer N through a rotary joint 304, and simultaneously, another part of the steam enters a heat exchanger 303 through a second steam pipe 302, and the air is heated to form hot air. The temperature of the hot air is controlled to be 120-130 ℃, the oxidation of the ternary precursor is accelerated due to overhigh temperature, the quality of the product is influenced, the drying speed is influenced due to low temperature, and the productivity is reduced. The hot air continues to flow in the direction of the kiln head 103 and enters the accommodating space M. The material enters the receiving space M from the feed screw 401. The kiln body 101 is rotated at a speed of about 5 revolutions per minute by being supported by an external rotating wheel. Under the action of the shoveling plate 105, the material in the accommodating space M rotates under the drive of the wall of the inner cylinder 102 and the shoveling plate 105, and after the material rotates to 90 degrees, the material starts to fall downwards under the action of gravity. When falling from the hollow shoveling plate 105, the materials not only fall due to gravity, but also move along the direction of the shoveling plate 105 by inertia, so that the materials are scattered when falling, the scattered materials are in good contact with dry hot air, and heat is absorbed to take away moisture. The loose packing density of the precursor in the accommodating space M is about 1.5g/cm3, and the accommodating space M has high specific gravity and large motion inertia.

The dried material enters the kiln head 103 and then enters the air lock 503 through the first blanking pipe 502. The air shutoff machine plays a role in isolating gas, and materials enter the spiral conveyor 501 through the second blanking pipe 503.

A small amount of material flows out from the gap between the material baffle 402 and the inner cylinder 102 along with the flow of the hot air, and falls to the material cleaning opening 104 a. The material collection port 104a is periodically opened, and the material collected therein is taken out and put into the feed screw 401 again. In addition, a small amount of materials enter the hot air output pipe 203 along with the hot air, and the pulse dust collector 207 collects the materials mixed with the hot air. The water-cooled condenser 208 condenses water vapor in the hot air to the outside of the apparatus. The cooled hot air passes through the hot air connection pipe 202 and flows into the hot air input pipe 201 again, thereby realizing the recycling of the hot air.

The flow of hot air is controlled by the blower 205 and the induced draft fan 204, which is significant for drying capacity and effect. The design and analysis of the hot air flow rate are as follows.

Temperature of hot air at the outlet: the boiling point of water at standard atmospheric pressure is 100 ℃. After the temperature is raised to 100 ℃, moisture of the wet precursor is vaporized and absorbs heat, and the temperature is not raised any more. The temperature of the hot air at the air outlet is set to be below 100 ℃ and is set to be 100 ℃.

Hot air humidity at the outlet: to ensure good evaporation efficiency, the relative humidity should be below 40% due to the endothermic effect of moisture evaporation. The moisture content of 40% air at 100 deg.C is about 237g, and the moisture content of air per cube is lower than 50g at normal temperature, i.e. about 237-50 ═ 187g of moisture can be taken from the rotary kiln by hot air per cube.

Hot air flow: if 1 ton of precursor with 6% water content is dried per hour, the water content is about 60kg, namely 60000g of water. 187g of water can be evaporated by each cubic hot air, and about 320 cubic hot air is needed for evaporating 60kg of water; when 2 tons of precursor are dried per hour, a flow rate of hot air of 2 × 320 to 640 cubic flows per hour is required.

Design and analysis of drying capacity:

during the drying of the precursor in the rotary kiln, the vaporization of the moisture absorbs most of the heat, and the heat of vaporization is used as an estimate for the design and analysis of the drying capacity.

To simplify the complex calculation, the model is simplified to a furnace body temperature of 120 ℃, a precursor at 100 ℃ is heated to 110 ℃ by the rotary kiln in a certain time, and then the precursor is thrown and raised. During the throwing process, the water is vaporized and quickly evaporated, and the water is vaporized and absorbs heat, so that the precursor is cooled to 100 ℃. The cooled precursor is then heated ┅. The temperature of the wall of the rotary kiln is 120 ℃, and the spreading thickness of the precursor is controlled, so that the precursor can be heated from 100 ℃ to 110 ℃ in 30 seconds on average. For convenient calculation, the equivalent is that the precursor is heated-evaporated and cooled for 120 times per hour. If 1 ton of precursor is arranged in the rotary kiln and the specific heat capacity of the precursor is set to be 0.3kJ/kg, the heat transferred to the precursor by the rotary kiln per hour is about:

A. heat absorbed each time the precursor is heated

Mass of heated precursor, specific heat capacity of precursor, and temperature change

＝1000*0.3*10

3000 KJ

B. The spreading thickness of the precursor is controlled, so that the precursor can be heated from 100 ℃ to 110 ℃ within 30 seconds, and the heating is simplified into 120 times per hour, and the temperature is increased from 100 ℃ to 120 ℃ each time.

C. Total heat exchanged per hour

Heat obtained per heating of the precursor per hour

＝3000*120

360000 (Qiaojiao)

About 1 kg of water can be vaporized per 2250 kj, and 360000 kj of water can be vaporized, the weight of which is:

360000/2250＝160kg

assuming that the water content of the precursor is 6%, 160kg of water corresponds to more than 2 tons of precursor being dried per hour.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A ternary precursor rotary kiln drying device is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the kiln body (100) comprises an outer cylinder (101) and an inner cylinder (102), an accommodating space (M) is formed inside the inner cylinder (102), and an interlayer (N) is formed between the outer cylinder (101) and the inner cylinder (102);

the hot air heating mechanism (200) comprises a hot air input pipe (201), a hot air connecting pipe (202) and a hot air output pipe (203), wherein the hot air input pipe (201) extends into one end of the kiln body (100), the hot air output pipe (203) extends into one end, far away from the hot air input pipe (201), of the kiln body (100), and one ends, far away from the kiln body (100), of the hot air input pipe (201) and the hot air output pipe (203) are communicated through the hot air connecting pipe (202); and the number of the first and second groups,

the steam heating mechanism (300) comprises a first steam pipe (301), and one end of the first steam pipe (301) extends into one end, close to the hot air input pipe (201), of the kiln body (100) and is communicated with the interlayer (N).

2. The drying device of the ternary precursor rotary kiln as claimed in claim 1, wherein: the kiln body (100) comprises a kiln head (103) and a kiln tail (104), and a plurality of shovelling plates (105) are arranged on the inner wall of the inner cylinder (102);

the kiln comprises a kiln head (103), a kiln body (100), a hot air input pipe (201) and a first steam pipe (301), wherein the kiln head (103) penetrates through the kiln head (100), the hot air output pipe (203) penetrates through the kiln tail (104) and extends into the kiln body (100), and rubber pressing strips (108) are arranged at the joints of the kiln head (103), the kiln tail (104) and an outer cylinder (101).

3. The drying device of the ternary precursor rotary kiln as claimed in claim 1 or 2, wherein:

the steam heating mechanism (300) further comprises a second steam pipe (302) and a heat exchanger (303), the heat exchanger (303) is arranged on the hot air input pipe (201), one end of the second steam pipe (302) is connected with the first steam pipe (301), and the other end of the second steam pipe (302) is connected with the hot air input pipe (201) through the heat exchanger (303).

4. Hot-blast heating mechanism (200) still includes draught fan (204), air-blower (205) and gulp valve (206), draught fan (204) set up in hot-blast output tube (203) and hot-blast connecting pipe (202) junction, air-blower (205) set up in hot-blast connecting pipe (202) and hot-blast input tube (201) junction, gulp valve (206) set up in on hot-blast connecting pipe (202).

5. The drying device of the ternary precursor rotary kiln as claimed in claim 1, wherein: steam heating mechanism (300) still includes rotary joint (304), rotary joint (304) set up the one end in kiln head (103) place side, rotary joint (304) include air inlet (304a) and a plurality of gas outlet (304b), gas outlet (304b) pass inner tube (102) jade and the intermediate layer (N) intercommunication, air inlet (304a) are connected to the one end of first steam conduit (301).

6. The drying device of the ternary precursor rotary kiln as claimed in claim 1, wherein: the kiln tail structure is characterized by further comprising a feeding mechanism (400), wherein the feeding mechanism (400) comprises a feeding screw (401), and one end of the feeding screw (401) penetrates through the kiln tail (104) to be communicated with the accommodating space (M).

7. The drying device of the ternary precursor rotary kiln as claimed in claim 6, wherein: the feeding mechanism (400) further comprises a material baffle (402) arranged at one end, close to the kiln tail (104), of the inner cylinder (102), the feeding spiral (401) penetrates through the kiln tail (104) and the material baffle (402) to be communicated with the accommodating space (M), and the kiln tail (104) is provided with a material cleaning port (104 a).

8. The drying device of the ternary precursor rotary kiln as claimed in claim 1, wherein: still include unloading mechanism (500), unloading mechanism (500) include screw conveyer (501), kiln head (103) are connected in screw conveyer (501), be provided with water-cooling jacket (501a) on screw conveyer (501).

9. The drying device of the ternary precursor rotary kiln as claimed in claim 1, wherein: the blanking mechanism (500) further comprises a first blanking pipe (502), a second blanking pipe (503) and a fan (504), one end of the first blanking pipe (502) is connected with the kiln head (103), the other end of the first blanking pipe is connected with the fan (504), one end of the second blanking pipe (503) is connected with the fan (504), and the other end of the second blanking pipe is connected with the screw conveyor (501).

10. The drying device for the ternary precursor rotary kiln as claimed in any one of claims 1 to 9, wherein: the utility model discloses a kiln hood, including urceolus (101) outer wall, kiln head (103) are close to one end and are provided with trap (109), trap (110) and intermediate layer (N) intercommunication, be provided with pulse dust collector (207) on hot-blast output tube (203), be provided with water-cooled condenser (208) on hot-blast connecting pipe (202), aeration valve (206) are connected with air cleaner (209).